Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/psaux/afmparse.c

Index: third_party/freetype2/src/src/psaux/afmparse.c
diff --git a/third_party/freetype2/src/src/psaux/afmparse.c b/third_party/freetype2/src/src/psaux/afmparse.c
new file mode 100644
index 0000000000000000000000000000000000000000..3ad44ec7240fe4c376daeee1f3ce79c6440c2636
--- /dev/null
+++ b/third_party/freetype2/src/src/psaux/afmparse.c
@@ -0,0 +1,977 @@
+/***************************************************************************/
+/*                                                                         */
+/*  afmparse.c                                                             */
+/*                                                                         */
+/*    AFM parser (body).                                                   */
+/*                                                                         */
+/*  Copyright 2006-2015 by                                                 */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  This file is part of the FreeType project, and may only be used,       */
+/*  modified, and distributed under the terms of the FreeType project      */
+/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
+/*  this file you indicate that you have read the license and              */
+/*  understand and accept it fully.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_POSTSCRIPT_AUX_H
+
+#include "afmparse.h"
+#include "psconv.h"
+
+#include "psauxerr.h"
+
+
+/***************************************************************************/
+/*                                                                         */
+/*    AFM_Stream                                                           */
+/*                                                                         */
+/* The use of AFM_Stream is largely inspired by parseAFM.[ch] from t1lib.  */
+/*                                                                         */
+/*                                                                         */
+
+  enum
+  {
+    AFM_STREAM_STATUS_NORMAL,
+    AFM_STREAM_STATUS_EOC,
+    AFM_STREAM_STATUS_EOL,
+    AFM_STREAM_STATUS_EOF
+  };
+
+
+  typedef struct  AFM_StreamRec_
+  {
+    FT_Byte*  cursor;
+    FT_Byte*  base;
+    FT_Byte*  limit;
+
+    FT_Int    status;
+
+  } AFM_StreamRec;
+
+
+#ifndef EOF
+#define EOF -1
+#endif
+
+
+  /* this works because empty lines are ignored */
+#define AFM_IS_NEWLINE( ch )  ( (ch) == '\r' || (ch) == '\n' )
+
+#define AFM_IS_EOF( ch )      ( (ch) == EOF  || (ch) == '\x1a' )
+#define AFM_IS_SPACE( ch )    ( (ch) == ' '  || (ch) == '\t' )
+
+  /* column separator; there is no `column' in the spec actually */
+#define AFM_IS_SEP( ch )      ( (ch) == ';' )
+
+#define AFM_GETC()                                                       \
+          ( ( (stream)->cursor < (stream)->limit ) ? *(stream)->cursor++ \
+                                                   : EOF )
+
+#define AFM_STREAM_KEY_BEGIN( stream )    \
+          (char*)( (stream)->cursor - 1 )
+
+#define AFM_STREAM_KEY_LEN( stream, key )           \
+          (FT_Offset)( (char*)(stream)->cursor - key - 1 )
+
+#define AFM_STATUS_EOC( stream ) \
+          ( (stream)->status >= AFM_STREAM_STATUS_EOC )
+
+#define AFM_STATUS_EOL( stream ) \
+          ( (stream)->status >= AFM_STREAM_STATUS_EOL )
+
+#define AFM_STATUS_EOF( stream ) \
+          ( (stream)->status >= AFM_STREAM_STATUS_EOF )
+
+
+  static int
+  afm_stream_skip_spaces( AFM_Stream  stream )
+  {
+    int  ch = 0;  /* make stupid compiler happy */
+
+
+    if ( AFM_STATUS_EOC( stream ) )
+      return ';';
+
+    while ( 1 )
+    {
+      ch = AFM_GETC();
+      if ( !AFM_IS_SPACE( ch ) )
+        break;
+    }
+
+    if ( AFM_IS_NEWLINE( ch ) )
+      stream->status = AFM_STREAM_STATUS_EOL;
+    else if ( AFM_IS_SEP( ch ) )
+      stream->status = AFM_STREAM_STATUS_EOC;
+    else if ( AFM_IS_EOF( ch ) )
+      stream->status = AFM_STREAM_STATUS_EOF;
+
+    return ch;
+  }
+
+
+  /* read a key or value in current column */
+  static char*
+  afm_stream_read_one( AFM_Stream  stream )
+  {
+    char*  str;
+
+
+    afm_stream_skip_spaces( stream );
+    if ( AFM_STATUS_EOC( stream ) )
+      return NULL;
+
+    str = AFM_STREAM_KEY_BEGIN( stream );
+
+    while ( 1 )
+    {
+      int  ch = AFM_GETC();
+
+
+      if ( AFM_IS_SPACE( ch ) )
+        break;
+      else if ( AFM_IS_NEWLINE( ch ) )
+      {
+        stream->status = AFM_STREAM_STATUS_EOL;
+        break;
+      }
+      else if ( AFM_IS_SEP( ch ) )
+      {
+        stream->status = AFM_STREAM_STATUS_EOC;
+        break;
+      }
+      else if ( AFM_IS_EOF( ch ) )
+      {
+        stream->status = AFM_STREAM_STATUS_EOF;
+        break;
+      }
+    }
+
+    return str;
+  }
+
+
+  /* read a string (i.e., read to EOL) */
+  static char*
+  afm_stream_read_string( AFM_Stream  stream )
+  {
+    char*  str;
+
+
+    afm_stream_skip_spaces( stream );
+    if ( AFM_STATUS_EOL( stream ) )
+      return NULL;
+
+    str = AFM_STREAM_KEY_BEGIN( stream );
+
+    /* scan to eol */
+    while ( 1 )
+    {
+      int  ch = AFM_GETC();
+
+
+      if ( AFM_IS_NEWLINE( ch ) )
+      {
+        stream->status = AFM_STREAM_STATUS_EOL;
+        break;
+      }
+      else if ( AFM_IS_EOF( ch ) )
+      {
+        stream->status = AFM_STREAM_STATUS_EOF;
+        break;
+      }
+    }
+
+    return str;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /*    AFM_Parser                                                         */
+  /*                                                                       */
+  /*                                                                       */
+
+  /* all keys defined in Ch. 7-10 of 5004.AFM_Spec.pdf */
+  typedef enum  AFM_Token_
+  {
+    AFM_TOKEN_ASCENDER,
+    AFM_TOKEN_AXISLABEL,
+    AFM_TOKEN_AXISTYPE,
+    AFM_TOKEN_B,
+    AFM_TOKEN_BLENDAXISTYPES,
+    AFM_TOKEN_BLENDDESIGNMAP,
+    AFM_TOKEN_BLENDDESIGNPOSITIONS,
+    AFM_TOKEN_C,
+    AFM_TOKEN_CC,
+    AFM_TOKEN_CH,
+    AFM_TOKEN_CAPHEIGHT,
+    AFM_TOKEN_CHARWIDTH,
+    AFM_TOKEN_CHARACTERSET,
+    AFM_TOKEN_CHARACTERS,
+    AFM_TOKEN_DESCENDER,
+    AFM_TOKEN_ENCODINGSCHEME,
+    AFM_TOKEN_ENDAXIS,
+    AFM_TOKEN_ENDCHARMETRICS,
+    AFM_TOKEN_ENDCOMPOSITES,
+    AFM_TOKEN_ENDDIRECTION,
+    AFM_TOKEN_ENDFONTMETRICS,
+    AFM_TOKEN_ENDKERNDATA,
+    AFM_TOKEN_ENDKERNPAIRS,
+    AFM_TOKEN_ENDTRACKKERN,
+    AFM_TOKEN_ESCCHAR,
+    AFM_TOKEN_FAMILYNAME,
+    AFM_TOKEN_FONTBBOX,
+    AFM_TOKEN_FONTNAME,
+    AFM_TOKEN_FULLNAME,
+    AFM_TOKEN_ISBASEFONT,
+    AFM_TOKEN_ISCIDFONT,
+    AFM_TOKEN_ISFIXEDPITCH,
+    AFM_TOKEN_ISFIXEDV,
+    AFM_TOKEN_ITALICANGLE,
+    AFM_TOKEN_KP,
+    AFM_TOKEN_KPH,
+    AFM_TOKEN_KPX,
+    AFM_TOKEN_KPY,
+    AFM_TOKEN_L,
+    AFM_TOKEN_MAPPINGSCHEME,
+    AFM_TOKEN_METRICSSETS,
+    AFM_TOKEN_N,
+    AFM_TOKEN_NOTICE,
+    AFM_TOKEN_PCC,
+    AFM_TOKEN_STARTAXIS,
+    AFM_TOKEN_STARTCHARMETRICS,
+    AFM_TOKEN_STARTCOMPOSITES,
+    AFM_TOKEN_STARTDIRECTION,
+    AFM_TOKEN_STARTFONTMETRICS,
+    AFM_TOKEN_STARTKERNDATA,
+    AFM_TOKEN_STARTKERNPAIRS,
+    AFM_TOKEN_STARTKERNPAIRS0,
+    AFM_TOKEN_STARTKERNPAIRS1,
+    AFM_TOKEN_STARTTRACKKERN,
+    AFM_TOKEN_STDHW,
+    AFM_TOKEN_STDVW,
+    AFM_TOKEN_TRACKKERN,
+    AFM_TOKEN_UNDERLINEPOSITION,
+    AFM_TOKEN_UNDERLINETHICKNESS,
+    AFM_TOKEN_VV,
+    AFM_TOKEN_VVECTOR,
+    AFM_TOKEN_VERSION,
+    AFM_TOKEN_W,
+    AFM_TOKEN_W0,
+    AFM_TOKEN_W0X,
+    AFM_TOKEN_W0Y,
+    AFM_TOKEN_W1,
+    AFM_TOKEN_W1X,
+    AFM_TOKEN_W1Y,
+    AFM_TOKEN_WX,
+    AFM_TOKEN_WY,
+    AFM_TOKEN_WEIGHT,
+    AFM_TOKEN_WEIGHTVECTOR,
+    AFM_TOKEN_XHEIGHT,
+    N_AFM_TOKENS,
+    AFM_TOKEN_UNKNOWN
+
+  } AFM_Token;
+
+
+  static const char*  const afm_key_table[N_AFM_TOKENS] =
+  {
+    "Ascender",
+    "AxisLabel",
+    "AxisType",
+    "B",
+    "BlendAxisTypes",
+    "BlendDesignMap",
+    "BlendDesignPositions",
+    "C",
+    "CC",
+    "CH",
+    "CapHeight",
+    "CharWidth",
+    "CharacterSet",
+    "Characters",
+    "Descender",
+    "EncodingScheme",
+    "EndAxis",
+    "EndCharMetrics",
+    "EndComposites",
+    "EndDirection",
+    "EndFontMetrics",
+    "EndKernData",
+    "EndKernPairs",
+    "EndTrackKern",
+    "EscChar",
+    "FamilyName",
+    "FontBBox",
+    "FontName",
+    "FullName",
+    "IsBaseFont",
+    "IsCIDFont",
+    "IsFixedPitch",
+    "IsFixedV",
+    "ItalicAngle",
+    "KP",
+    "KPH",
+    "KPX",
+    "KPY",
+    "L",
+    "MappingScheme",
+    "MetricsSets",
+    "N",
+    "Notice",
+    "PCC",
+    "StartAxis",
+    "StartCharMetrics",
+    "StartComposites",
+    "StartDirection",
+    "StartFontMetrics",
+    "StartKernData",
+    "StartKernPairs",
+    "StartKernPairs0",
+    "StartKernPairs1",
+    "StartTrackKern",
+    "StdHW",
+    "StdVW",
+    "TrackKern",
+    "UnderlinePosition",
+    "UnderlineThickness",
+    "VV",
+    "VVector",
+    "Version",
+    "W",
+    "W0",
+    "W0X",
+    "W0Y",
+    "W1",
+    "W1X",
+    "W1Y",
+    "WX",
+    "WY",
+    "Weight",
+    "WeightVector",
+    "XHeight"
+  };
+
+
+  /*
+   * `afm_parser_read_vals' and `afm_parser_next_key' provide
+   * high-level operations to an AFM_Stream.  The rest of the
+   * parser functions should use them without accessing the
+   * AFM_Stream directly.
+   */
+
+  FT_LOCAL_DEF( FT_Int )
+  afm_parser_read_vals( AFM_Parser  parser,
+                        AFM_Value   vals,
+                        FT_Int      n )
+  {
+    AFM_Stream  stream = parser->stream;
+    char*       str;
+    FT_Int      i;
+
+
+    if ( n > AFM_MAX_ARGUMENTS )
+      return 0;
+
+    for ( i = 0; i < n; i++ )
+    {
+      FT_Offset  len;
+      AFM_Value  val = vals + i;
+
+
+      if ( val->type == AFM_VALUE_TYPE_STRING )
+        str = afm_stream_read_string( stream );
+      else
+        str = afm_stream_read_one( stream );
+
+      if ( !str )
+        break;
+
+      len = AFM_STREAM_KEY_LEN( stream, str );
+
+      switch ( val->type )
+      {
+      case AFM_VALUE_TYPE_STRING:
+      case AFM_VALUE_TYPE_NAME:
+        {
+          FT_Memory  memory = parser->memory;
+          FT_Error   error;
+
+
+          if ( !FT_QALLOC( val->u.s, len + 1 ) )
+          {
+            ft_memcpy( val->u.s, str, len );
+            val->u.s[len] = '\0';
+          }
+        }
+        break;
+
+      case AFM_VALUE_TYPE_FIXED:
+        val->u.f = PS_Conv_ToFixed( (FT_Byte**)(void*)&str,
+                                    (FT_Byte*)str + len, 0 );
+        break;
+
+      case AFM_VALUE_TYPE_INTEGER:
+        val->u.i = PS_Conv_ToInt( (FT_Byte**)(void*)&str,
+                                  (FT_Byte*)str + len );
+        break;
+
+      case AFM_VALUE_TYPE_BOOL:
+        val->u.b = FT_BOOL( len == 4                      &&
+                            !ft_strncmp( str, "true", 4 ) );
+        break;
+
+      case AFM_VALUE_TYPE_INDEX:
+        if ( parser->get_index )
+          val->u.i = parser->get_index( str, len, parser->user_data );
+        else
+          val->u.i = 0;
+        break;
+      }
+    }
+
+    return i;
+  }
+
+
+  FT_LOCAL_DEF( char* )
+  afm_parser_next_key( AFM_Parser  parser,
+                       FT_Bool     line,
+                       FT_Offset*  len )
+  {
+    AFM_Stream  stream = parser->stream;
+    char*       key    = NULL;  /* make stupid compiler happy */
+
+
+    if ( line )
+    {
+      while ( 1 )
+      {
+        /* skip current line */
+        if ( !AFM_STATUS_EOL( stream ) )
+          afm_stream_read_string( stream );
+
+        stream->status = AFM_STREAM_STATUS_NORMAL;
+        key = afm_stream_read_one( stream );
+
+        /* skip empty line */
+        if ( !key                      &&
+             !AFM_STATUS_EOF( stream ) &&
+             AFM_STATUS_EOL( stream )  )
+          continue;
+
+        break;
+      }
+    }
+    else
+    {
+      while ( 1 )
+      {
+        /* skip current column */
+        while ( !AFM_STATUS_EOC( stream ) )
+          afm_stream_read_one( stream );
+
+        stream->status = AFM_STREAM_STATUS_NORMAL;
+        key = afm_stream_read_one( stream );
+
+        /* skip empty column */
+        if ( !key                      &&
+             !AFM_STATUS_EOF( stream ) &&
+             AFM_STATUS_EOC( stream )  )
+          continue;
+
+        break;
+      }
+    }
+
+    if ( len )
+      *len = ( key ) ? (FT_Offset)AFM_STREAM_KEY_LEN( stream, key )
+                     : 0;
+
+    return key;
+  }
+
+
+  static AFM_Token
+  afm_tokenize( const char*  key,
+                FT_Offset    len )
+  {
+    int  n;
+
+
+    for ( n = 0; n < N_AFM_TOKENS; n++ )
+    {
+      if ( *( afm_key_table[n] ) == *key )
+      {
+        for ( ; n < N_AFM_TOKENS; n++ )
+        {
+          if ( *( afm_key_table[n] ) != *key )
+            return AFM_TOKEN_UNKNOWN;
+
+          if ( ft_strncmp( afm_key_table[n], key, len ) == 0 )
+            return (AFM_Token) n;
+        }
+      }
+    }
+
+    return AFM_TOKEN_UNKNOWN;
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  afm_parser_init( AFM_Parser  parser,
+                   FT_Memory   memory,
+                   FT_Byte*    base,
+                   FT_Byte*    limit )
+  {
+    AFM_Stream  stream = NULL;
+    FT_Error    error;
+
+
+    if ( FT_NEW( stream ) )
+      return error;
+
+    stream->cursor = stream->base = base;
+    stream->limit  = limit;
+
+    /* don't skip the first line during the first call */
+    stream->status = AFM_STREAM_STATUS_EOL;
+
+    parser->memory    = memory;
+    parser->stream    = stream;
+    parser->FontInfo  = NULL;
+    parser->get_index = NULL;
+
+    return FT_Err_Ok;
+  }
+
+
+  FT_LOCAL( void )
+  afm_parser_done( AFM_Parser  parser )
+  {
+    FT_Memory  memory = parser->memory;
+
+
+    FT_FREE( parser->stream );
+  }
+
+
+  static FT_Error
+  afm_parser_read_int( AFM_Parser  parser,
+                       FT_Int*     aint )
+  {
+    AFM_ValueRec  val;
+
+
+    val.type = AFM_VALUE_TYPE_INTEGER;
+
+    if ( afm_parser_read_vals( parser, &val, 1 ) == 1 )
+    {
+      *aint = val.u.i;
+
+      return FT_Err_Ok;
+    }
+    else
+      return FT_THROW( Syntax_Error );
+  }
+
+
+  static FT_Error
+  afm_parse_track_kern( AFM_Parser  parser )
+  {
+    AFM_FontInfo   fi = parser->FontInfo;
+    AFM_TrackKern  tk;
+    char*          key;
+    FT_Offset      len;
+    int            n = -1;
+    FT_Int         tmp;
+
+
+    if ( afm_parser_read_int( parser, &tmp ) )
+        goto Fail;
+
+    if ( tmp < 0 )
+      goto Fail;
+
+    fi->NumTrackKern = (FT_UInt)tmp;
+
+    if ( fi->NumTrackKern )
+    {
+      FT_Memory  memory = parser->memory;
+      FT_Error   error;
+
+
+      if ( FT_QNEW_ARRAY( fi->TrackKerns, fi->NumTrackKern ) )
+        return error;
+    }
+
+    while ( ( key = afm_parser_next_key( parser, 1, &len ) ) != 0 )
+    {
+      AFM_ValueRec  shared_vals[5];
+
+
+      switch ( afm_tokenize( key, len ) )
+      {
+      case AFM_TOKEN_TRACKKERN:
+        n++;
+
+        if ( n >= (int)fi->NumTrackKern )
+          goto Fail;
+
+        tk = fi->TrackKerns + n;
+
+        shared_vals[0].type = AFM_VALUE_TYPE_INTEGER;
+        shared_vals[1].type = AFM_VALUE_TYPE_FIXED;
+        shared_vals[2].type = AFM_VALUE_TYPE_FIXED;
+        shared_vals[3].type = AFM_VALUE_TYPE_FIXED;
+        shared_vals[4].type = AFM_VALUE_TYPE_FIXED;
+        if ( afm_parser_read_vals( parser, shared_vals, 5 ) != 5 )
+          goto Fail;
+
+        tk->degree     = shared_vals[0].u.i;
+        tk->min_ptsize = shared_vals[1].u.f;
+        tk->min_kern   = shared_vals[2].u.f;
+        tk->max_ptsize = shared_vals[3].u.f;
+        tk->max_kern   = shared_vals[4].u.f;
+
+        break;
+
+      case AFM_TOKEN_ENDTRACKKERN:
+      case AFM_TOKEN_ENDKERNDATA:
+      case AFM_TOKEN_ENDFONTMETRICS:
+        fi->NumTrackKern = (FT_UInt)( n + 1 );
+        return FT_Err_Ok;
+
+      case AFM_TOKEN_UNKNOWN:
+        break;
+
+      default:
+        goto Fail;
+      }
+    }
+
+  Fail:
+    return FT_THROW( Syntax_Error );
+  }
+
+
+#undef  KERN_INDEX
+#define KERN_INDEX( g1, g2 )  ( ( (FT_ULong)g1 << 16 ) | g2 )
+
+
+  /* compare two kerning pairs */
+  FT_CALLBACK_DEF( int )
+  afm_compare_kern_pairs( const void*  a,
+                          const void*  b )
+  {
+    AFM_KernPair  kp1 = (AFM_KernPair)a;
+    AFM_KernPair  kp2 = (AFM_KernPair)b;
+
+    FT_ULong  index1 = KERN_INDEX( kp1->index1, kp1->index2 );
+    FT_ULong  index2 = KERN_INDEX( kp2->index1, kp2->index2 );
+
+
+    if ( index1 > index2 )
+      return 1;
+    else if ( index1 < index2 )
+      return -1;
+    else
+      return 0;
+  }
+
+
+  static FT_Error
+  afm_parse_kern_pairs( AFM_Parser  parser )
+  {
+    AFM_FontInfo  fi = parser->FontInfo;
+    AFM_KernPair  kp;
+    char*         key;
+    FT_Offset     len;
+    int           n = -1;
+    FT_Int        tmp;
+
+
+    if ( afm_parser_read_int( parser, &tmp ) )
+      goto Fail;
+
+    if ( tmp < 0 )
+      goto Fail;
+
+    fi->NumKernPair = (FT_UInt)tmp;
+
+    if ( fi->NumKernPair )
+    {
+      FT_Memory  memory = parser->memory;
+      FT_Error   error;
+
+
+      if ( FT_QNEW_ARRAY( fi->KernPairs, fi->NumKernPair ) )
+        return error;
+    }
+
+    while ( ( key = afm_parser_next_key( parser, 1, &len ) ) != 0 )
+    {
+      AFM_Token  token = afm_tokenize( key, len );
+
+
+      switch ( token )
+      {
+      case AFM_TOKEN_KP:
+      case AFM_TOKEN_KPX:
+      case AFM_TOKEN_KPY:
+        {
+          FT_Int        r;
+          AFM_ValueRec  shared_vals[4];
+
+
+          n++;
+
+          if ( n >= (int)fi->NumKernPair )
+            goto Fail;
+
+          kp = fi->KernPairs + n;
+
+          shared_vals[0].type = AFM_VALUE_TYPE_INDEX;
+          shared_vals[1].type = AFM_VALUE_TYPE_INDEX;
+          shared_vals[2].type = AFM_VALUE_TYPE_INTEGER;
+          shared_vals[3].type = AFM_VALUE_TYPE_INTEGER;
+          r = afm_parser_read_vals( parser, shared_vals, 4 );
+          if ( r < 3 )
+            goto Fail;
+
+          /* index values can't be negative */
+          kp->index1 = shared_vals[0].u.u;
+          kp->index2 = shared_vals[1].u.u;
+          if ( token == AFM_TOKEN_KPY )
+          {
+            kp->x = 0;
+            kp->y = shared_vals[2].u.i;
+          }
+          else
+          {
+            kp->x = shared_vals[2].u.i;
+            kp->y = ( token == AFM_TOKEN_KP && r == 4 )
+                      ? shared_vals[3].u.i : 0;
+          }
+        }
+        break;
+
+      case AFM_TOKEN_ENDKERNPAIRS:
+      case AFM_TOKEN_ENDKERNDATA:
+      case AFM_TOKEN_ENDFONTMETRICS:
+        fi->NumKernPair = (FT_UInt)( n + 1 );
+        ft_qsort( fi->KernPairs, fi->NumKernPair,
+                  sizeof ( AFM_KernPairRec ),
+                  afm_compare_kern_pairs );
+        return FT_Err_Ok;
+
+      case AFM_TOKEN_UNKNOWN:
+        break;
+
+      default:
+        goto Fail;
+      }
+    }
+
+  Fail:
+    return FT_THROW( Syntax_Error );
+  }
+
+
+  static FT_Error
+  afm_parse_kern_data( AFM_Parser  parser )
+  {
+    FT_Error   error;
+    char*      key;
+    FT_Offset  len;
+
+
+    while ( ( key = afm_parser_next_key( parser, 1, &len ) ) != 0 )
+    {
+      switch ( afm_tokenize( key, len ) )
+      {
+      case AFM_TOKEN_STARTTRACKKERN:
+        error = afm_parse_track_kern( parser );
+        if ( error )
+          return error;
+        break;
+
+      case AFM_TOKEN_STARTKERNPAIRS:
+      case AFM_TOKEN_STARTKERNPAIRS0:
+        error = afm_parse_kern_pairs( parser );
+        if ( error )
+          return error;
+        break;
+
+      case AFM_TOKEN_ENDKERNDATA:
+      case AFM_TOKEN_ENDFONTMETRICS:
+        return FT_Err_Ok;
+
+      case AFM_TOKEN_UNKNOWN:
+        break;
+
+      default:
+        goto Fail;
+      }
+    }
+
+  Fail:
+    return FT_THROW( Syntax_Error );
+  }
+
+
+  static FT_Error
+  afm_parser_skip_section( AFM_Parser  parser,
+                           FT_Int      n,
+                           AFM_Token   end_section )
+  {
+    char*      key;
+    FT_Offset  len;
+
+
+    while ( n-- > 0 )
+    {
+      key = afm_parser_next_key( parser, 1, NULL );
+      if ( !key )
+        goto Fail;
+    }
+
+    while ( ( key = afm_parser_next_key( parser, 1, &len ) ) != 0 )
+    {
+      AFM_Token  token = afm_tokenize( key, len );
+
+
+      if ( token == end_section || token == AFM_TOKEN_ENDFONTMETRICS )
+        return FT_Err_Ok;
+    }
+
+  Fail:
+    return FT_THROW( Syntax_Error );
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  afm_parser_parse( AFM_Parser  parser )
+  {
+    FT_Memory     memory = parser->memory;
+    AFM_FontInfo  fi     = parser->FontInfo;
+    FT_Error      error  = FT_ERR( Syntax_Error );
+    char*         key;
+    FT_Offset     len;
+    FT_Int        metrics_sets = 0;
+
+
+    if ( !fi )
+      return FT_THROW( Invalid_Argument );
+
+    key = afm_parser_next_key( parser, 1, &len );
+    if ( !key || len != 16                              ||
+         ft_strncmp( key, "StartFontMetrics", 16 ) != 0 )
+      return FT_THROW( Unknown_File_Format );
+
+    while ( ( key = afm_parser_next_key( parser, 1, &len ) ) != 0 )
+    {
+      AFM_ValueRec  shared_vals[4];
+
+
+      switch ( afm_tokenize( key, len ) )
+      {
+      case AFM_TOKEN_METRICSSETS:
+        if ( afm_parser_read_int( parser, &metrics_sets ) )
+          goto Fail;
+
+        if ( metrics_sets != 0 && metrics_sets != 2 )
+        {
+          error = FT_THROW( Unimplemented_Feature );
+
+          goto Fail;
+        }
+        break;
+
+      case AFM_TOKEN_ISCIDFONT:
+        shared_vals[0].type = AFM_VALUE_TYPE_BOOL;
+        if ( afm_parser_read_vals( parser, shared_vals, 1 ) != 1 )
+          goto Fail;
+
+        fi->IsCIDFont = shared_vals[0].u.b;
+        break;
+
+      case AFM_TOKEN_FONTBBOX:
+        shared_vals[0].type = AFM_VALUE_TYPE_FIXED;
+        shared_vals[1].type = AFM_VALUE_TYPE_FIXED;
+        shared_vals[2].type = AFM_VALUE_TYPE_FIXED;
+        shared_vals[3].type = AFM_VALUE_TYPE_FIXED;
+        if ( afm_parser_read_vals( parser, shared_vals, 4 ) != 4 )
+          goto Fail;
+
+        fi->FontBBox.xMin = shared_vals[0].u.f;
+        fi->FontBBox.yMin = shared_vals[1].u.f;
+        fi->FontBBox.xMax = shared_vals[2].u.f;
+        fi->FontBBox.yMax = shared_vals[3].u.f;
+        break;
+
+      case AFM_TOKEN_ASCENDER:
+        shared_vals[0].type = AFM_VALUE_TYPE_FIXED;
+        if ( afm_parser_read_vals( parser, shared_vals, 1 ) != 1 )
+          goto Fail;
+
+        fi->Ascender = shared_vals[0].u.f;
+        break;
+
+      case AFM_TOKEN_DESCENDER:
+        shared_vals[0].type = AFM_VALUE_TYPE_FIXED;
+        if ( afm_parser_read_vals( parser, shared_vals, 1 ) != 1 )
+          goto Fail;
+
+        fi->Descender = shared_vals[0].u.f;
+        break;
+
+      case AFM_TOKEN_STARTCHARMETRICS:
+        {
+          FT_Int  n = 0;
+
+
+          if ( afm_parser_read_int( parser, &n ) )
+            goto Fail;
+
+          error = afm_parser_skip_section( parser, n,
+                                           AFM_TOKEN_ENDCHARMETRICS );
+          if ( error )
+            return error;
+        }
+        break;
+
+      case AFM_TOKEN_STARTKERNDATA:
+        error = afm_parse_kern_data( parser );
+        if ( error )
+          goto Fail;
+        /* fall through since we only support kern data */
+
+      case AFM_TOKEN_ENDFONTMETRICS:
+        return FT_Err_Ok;
+
+      default:
+        break;
+      }
+    }
+
+  Fail:
+    FT_FREE( fi->TrackKerns );
+    fi->NumTrackKern = 0;
+
+    FT_FREE( fi->KernPairs );
+    fi->NumKernPair = 0;
+
+    fi->IsCIDFont = 0;
+
+    return error;
+  }
+
+
+/* END */